43221444 has 48 divisors (see below), whose sum is σ = 115584000. Its totient is φ = 12314016.

The previous prime is 43221433. The next prime is 43221449. The reversal of 43221444 is 44412234.

It is a happy number.

It is a nude number because it is divisible by every one of its digits.

It is not an unprimeable number, because it can be changed into a prime (43221449) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 49887 + ... + 50745.

It is an arithmetic number, because the mean of its divisors is an integer number (2408000).

Almost surely, 2^43221444 is an apocalyptic number.

It is an amenable number.

43221444 is an abundant number, since it is smaller than the sum of its proper divisors (72362556).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

43221444 is a wasteful number, since it uses less digits than its factorization.

43221444 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1472 (or 1470 counting only the distinct ones).

The product of its digits is 3072, while the sum is 24.

The square root of 43221444 is about 6574.3017880228. The cubic root of 43221444 is about 350.9401769784.

Adding to 43221444 its reverse (44412234), we get a palindrome (87633678).

The spelling of 43221444 in words is "forty-three million, two hundred twenty-one thousand, four hundred forty-four".